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What FS Mountain Bike Should I buy 120 mm travel or 140 mm travel?

9845 Views 58 Replies 30 Participants Last post by  ejewels
Dear Everyone,

I am buying my first new FS MTB in over a decade and would like some advice and insights. Firstly, I am 47 years old and looking for a bike that I can take on green and maybe easier intermediate trails. At my age, I am not interested in jumping a bike, but living in the Northeast I see myself going over roots and rock in trails. I am definitely not interested.in bike parks with large jumps or any trails beyond an intermediate level.

My previous bike was a 2009 Kona Dawg Deluxe with 150 mm / 140 mm travel. I always found the bike a bit unstable and not the most efficient for pedaling. A few weeks ago, I put down a deposit on a large 2022 Trek Top Fuel 9.7 with the intentions of upgrading the fork (to a Fox 34 SC and wheels to a set of Reserve 30 SL to loss some weight. The 2022 Top Fuel has 120 mm of travel front and rear, but I wonder if I would be better served by a bike with more travel such as a Specialized Stumpjumper (130 mm rear / 140 mm front).

Question: If I am not intentionally jumping the bike is the 120 mm vs. 140 mm of travel going to be that significant?

I definitely do not want anything beyond 140 mm travel and do realize that the Top Fuel can take a 130 mm travel fork.

Please advise and thank you.
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I can't speak to the trails you'll ride most, but if typical XC-style, 120/120 should serve you well. You'll save a bit of weight, and maybe a bit of money.

That said, coming from 150/140, you may prefer - and be used to - more travel.
I can't speak to the trails you'll ride most, but if typical XC-style, 120/120 should serve you well. You'll save a bit of weight, and maybe a bit of money.

That said, coming from 150/140, you may prefer - and be used to - more travel.
About 4-5 years ago I sold the Kona so I have not been on a MTB in a few years. In that time using my Trek Domane on paved rail trails have been my interest when cycling.
Most new 120mm bikes will be more capable than your old 150. I'd stick with the Top Fuel.
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I can’t speak to that specific bike. However I do have the new stumpjumper 140/130 bike. I am 50 and ride New England trails as well. Mostly in CT, VT & Maine.

I bought my son a fuel at the beginning of the pandemic and it seems like a good bike but his medium frame bike is heavier than my xxl (s6) frame.

I think Your question about roots is important. With so many riders out there now the trails are getting tougher and tougher. So more suspension is not a bad thing within reason.
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I can’t speak to that specific bike. However I do have the new stumpjumper 140/130 bike. I am 50 and ride New England trails as well. Mostly in CT, VT & Maine.

I bought my son a fuel at the beginning of the pandemic and it seems like a good bike but his medium frame bike is heavier than my xxl (s6) frame.

I think Your question about roots is important. With so many riders out there now the trails are getting tougher and tougher. So more suspension is not a bad thing within reason.
Thank you for the advice. I do realize that we are taking only 10 mm difference on the front and rear if one configures the Top Fuel with 130 mm fork. Can 10 mm additional travel be that significant? We are talking 0.4" of additional travel?
I bought my son a fuel at the beginning of the pandemic and it seems like a good bike but his medium frame bike is heavier than my xxl (s6) frame.

What builds? The Top Fuel 9.7 is pretty light. Also a very good all-rounder imo, especially if you don't plan on getting real rowdy.
Thank you for the advice. I do realize that we are taking only 10 mm difference on the front and rear if one configures the Top Fuel with 130 mm fork. Can 10 mm additional travel be that significant? We are talking 0.4" of additional travel?
Me personally I don’t think it will be significant. I think there is so much placebo effect with most of this stuff. Maybe not travel but I laugh every time I hear someone rave about the stiffness difference between a 34 & 36. People want to feel a difference after spending $1500 to gain X.

That being said I don’t have direct experience in switching back and forth across bikes with that delta Which I think is what you would need to do to tell a difference.
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What builds? The Top Fuel 9.7 is pretty light. Also a very good all-rounder imo, especially if you don't plan on getting real rowdy.
I am looking at the entry level carbon frame build, which is a 9.7 model. I have tentatively planned to upgrade the fork to a 2022 Fox 34 Factory Step Cast and the wheelset to Reserve 30 SL with i9 hubs. I don't plan on getting to rowdy at my age. Most riding will be green level trails and maybe some easy ( jumps < a foot) intermediate trails. Definitely nothing more challenging that intermediate level.
I think 120-130mm rear travel is the sweet spot for you based on your description of your riding.

I am looking at the entry level carbon frame build, which is a 9.7 model. I have tentatively planned to upgrade the fork to a 2022 Fox 34 Factory Step Cast and the wheelset to Reserve 30 SL with i9 hubs.
Just FYI if you get the SC fork you can't change the travel, you're stuck with 120mm. The regular Fox 34 can be changed with an air shaft should you ever decide to go to 130mm.
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I think 120-130mm rear travel is the sweet spot for you based on your description of your riding.



Just FYI if you get the SC fork you can't change the travel, you're stuck with 120mm. The regular Fox 34 can be changed with an air shaft should you ever decide to go to 130mm.
Is that the same case with the SC 36 & Bombers or are they more like the regular 34?

120mm front and rear should be enough. I'm getting a 130mm ht for similar reasons and don't see myself wanting anything more than that or even a rear sus personally(that & my budget is tighter).
I am buying my first new FS MTB in over a decade and would like some advice and insights. Firstly, I am 47 years old and looking for a bike that I can take on green and maybe easier intermediate trails.
Travel won't be a factor (as in you don't "need more") and weight won't be much of a factor either since it doesn't sound like you're going to do much climbing. Get what feels the most comfortable with some concentration on a bike that minimizes or eliminates hand pain, which seems to be a common issue these days.
Don't upgrade your fork unless money is burning a hole in your pocket.
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I am looking at the entry level carbon frame build, which is a 9.7 model. I have tentatively planned to upgrade the fork to a 2022 Fox 34 Factory Step Cast and the wheelset to Reserve 30 SL with i9 hubs. I don't plan on getting to rowdy at my age. Most riding will be green level trails and maybe some easy (no jumps < a foot) intermediate trails. Definitely nothing more challenging that intermediate level.
The most expensive way to buy a bike is to buy it and upgrade it. Swapping to a stepcast fork serves no purpose and the FIT4 is a downgrade fro the grip in ride quality. Pay the extra now to get the bike with the wheels and components you want.

There are plenty of great bikes that will do what you want, the Fuel EX, Stumpjumper, Ripley, Tallboy, Transition Spur, and the list goes on. Pick the one you like best, spend the time to set it up properly, and enjoy.
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Thank you for the advice. I do realize that we are taking only 10 mm difference on the front and rear if one configures the Top Fuel with 130 mm fork. Can 10 mm additional travel be that significant? We are talking 0.4" of additional travel?

YOu also gotta account for head angles as you go bigger travel. If its too slack, it may be a little slow to turn in tight slow speed corners.
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I don't plan on getting to rowdy at my age.
That's what they all say and then, you know, one thing leads to another...

Next thing you know you’re sending it for the boys!
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I think 120-130mm rear travel is the sweet spot for you based on your description of your riding.



Just FYI if you get the SC fork you can't change the travel, you're stuck with 120mm. The regular Fox 34 can be changed with an air shaft should you ever decide to go to 130mm.
Thank you for the info. Might look into a 130 mm fork.
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Travel won't be a factor (as in you don't "need more") and weight won't be much of a factor either since it doesn't sound like you're going to do much climbing. Get what feels the most comfortable with some concentration on a bike that minimizes or eliminates hand pain, which seems to be a common issue these days.
Don't upgrade your fork unless money is burning a hole in your pocket.
The best thing I have done to minimize hand pain is to install a one up carbon handle bar,
It made a HUGE difference!
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The best thing I have done to minimize hand pain is to install a one up carbon handle bar,
It made a HUGE difference!
I do have a set of Brontrager Line Pro Carbon Bars and Ergon Grips; I do hope the combination reduces hand pain.
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Thank you to everyone for their advice. I will stick with the Top Fuel. I will be doing some climbing and it seems to be a reasonable bike given the type of trails and aggressiveness (or lack their of) I plan to ride.
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Dear Everyone,

I am buying my first new FS MTB in over a decade and would like some advice and insights. Firstly, I am 47 years old and looking for a bike that I can take on green and maybe easier intermediate trails. At my age, I am not interested in jumping a bike, but living in the Northeast I see myself going over roots and rock in trails. I am definitely not interested.in bike parks with large jumps or any trails beyond an intermediate level.

My previous bike was a 2009 Kona Dawg Deluxe with 150 mm / 140 mm travel. I always found the bike a bit unstable and not the most efficient for pedaling. A few weeks ago, I put down a deposit on a large 2022 Trek Top Fuel 9.7 with the intentions of upgrading the fork (to a Fox 34 SC and wheels to a set of Reserve 30 SL to loss some weight. The 2022 Top Fuel has 120 mm of travel front and rear, but I wonder if I would be better served by a bike with more travel such as a Specialized Stumpjumper (130 mm rear / 140 mm front).

Question: If I am not intentionally jumping the bike is the 120 mm vs. 140 mm of travel going to be that significant?

I definitely do not want anything beyond 140 mm travel and do realize that the Top Fuel can take a 130 mm travel fork.

Please advise and thank you.
120mm is more than capable. I'm 43, I have a 160mm enduro I mostly use at bike parks in the Northeast, and a 100mm hardtail I've ridden from VT to PA (I live in PA). Not much out there it didn't handle outside the bike parks, so if you're doing more intermediate trails, a FS 120mm is more than capable.
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